drivers/infiniband/ulp/ipoib/ipoib_fs.c

   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/err.h>
  34 #include <linux/seq_file.h>
  35 #include <linux/slab.h>
  36
  37 struct file_operations;
  38
  39 #include <linux/debugfs.h>
  40 #include <linux/export.h>
  41
  42 #include "ipoib.h"
  43
  44 static struct dentry *ipoib_root;
  45
  46 static void format_gid(union ib_gid *gid, char *buf)
  47 {
  48         int i, n;
  49
  50         for (n = 0, i = 0; i < 8; ++i) {
  51                 n += sprintf(buf + n, "%x",
  52                              be16_to_cpu(((__be16 *) gid->raw)[i]));
  53                 if (i < 7)
  54                         buf[n++] = ':';
  55         }
  56 }
  57
  58 static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
  59 {
  60         struct ipoib_mcast_iter *iter;
  61         loff_t n = *pos;
  62
  63         iter = ipoib_mcast_iter_init(file->private);
  64         if (!iter)
  65                 return NULL;
  66
  67         while (n--) {
  68                 if (ipoib_mcast_iter_next(iter)) {
  69                         kfree(iter);
  70                         return NULL;
  71                 }
  72         }
  73
  74         return iter;
  75 }
  76
  77 static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
  78                                    loff_t *pos)
  79 {
  80         struct ipoib_mcast_iter *iter = iter_ptr;
  81
  82         (*pos)++;
  83
  84         if (ipoib_mcast_iter_next(iter)) {
  85                 kfree(iter);
  86                 return NULL;
  87         }
  88
  89         return iter;
  90 }
  91
  92 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
  93 {
  94         /* nothing for now */
  95 }
  96
  97 static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
  98 {
  99         struct ipoib_mcast_iter *iter = iter_ptr;
 100         char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
 101         union ib_gid mgid;
 102         unsigned long created;
 103         unsigned int queuelen, complete, send_only;
 104
 105         if (!iter)
 106                 return 0;
 107
 108         ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
 109                               &complete, &send_only);
 110
 111         format_gid(&mgid, gid_buf);
 112
 113         seq_printf(file,
 114                    "GID: %s\n"
 115                    "  created: %10ld\n"
 116                    "  queuelen: %9d\n"
 117                    "  complete: %9s\n"
 118                    "  send_only: %8s\n"
 119                    "\n",
 120                    gid_buf, created, queuelen,
 121                    complete ? "yes" : "no",
 122                    send_only ? "yes" : "no");
 123
 124         return 0;
 125 }
 126
 127 static const struct seq_operations ipoib_mcg_sops = {
 128         .start = ipoib_mcg_seq_start,
 129         .next  = ipoib_mcg_seq_next,
 130         .stop  = ipoib_mcg_seq_stop,
 131         .show  = ipoib_mcg_seq_show,
 132 };
 133
 134 DEFINE_SEQ_ATTRIBUTE(ipoib_mcg);
 135
 136 static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
 137 {
 138         struct ipoib_path_iter *iter;
 139         loff_t n = *pos;
 140
 141         iter = ipoib_path_iter_init(file->private);
 142         if (!iter)
 143                 return NULL;
 144
 145         while (n--) {
 146                 if (ipoib_path_iter_next(iter)) {
 147                         kfree(iter);
 148                         return NULL;
 149                 }
 150         }
 151
 152         return iter;
 153 }
 154
 155 static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
 156                                    loff_t *pos)
 157 {
 158         struct ipoib_path_iter *iter = iter_ptr;
 159
 160         (*pos)++;
 161
 162         if (ipoib_path_iter_next(iter)) {
 163                 kfree(iter);
 164                 return NULL;
 165         }
 166
 167         return iter;
 168 }
 169
 170 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
 171 {
 172         /* nothing for now */
 173 }
 174
 175 static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
 176 {
 177         struct ipoib_path_iter *iter = iter_ptr;
 178         char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
 179         struct ipoib_path path;
 180         int rate;
 181
 182         if (!iter)
 183                 return 0;
 184
 185         ipoib_path_iter_read(iter, &path);
 186
 187         format_gid(&path.pathrec.dgid, gid_buf);
 188
 189         seq_printf(file,
 190                    "GID: %s\n"
 191                    "  complete: %6s\n",
 192                    gid_buf, sa_path_get_dlid(&path.pathrec) ? "yes" : "no");
 193
 194         if (sa_path_get_dlid(&path.pathrec)) {
 195                 rate = ib_rate_to_mbps(path.pathrec.rate);
 196
 197                 seq_printf(file,
 198                            "  DLID:     0x%04x\n"
 199                            "  SL: %12d\n"
 200                            "  rate: %8d.%d Gb/sec\n",
 201                            be32_to_cpu(sa_path_get_dlid(&path.pathrec)),
 202                            path.pathrec.sl,
 203                            rate / 1000, rate % 1000);
 204         }
 205
 206         seq_putc(file, '\n');
 207
 208         return 0;
 209 }
 210
 211 static const struct seq_operations ipoib_path_sops = {
 212         .start = ipoib_path_seq_start,
 213         .next  = ipoib_path_seq_next,
 214         .stop  = ipoib_path_seq_stop,
 215         .show  = ipoib_path_seq_show,
 216 };
 217
 218 DEFINE_SEQ_ATTRIBUTE(ipoib_path);
 219
 220 void ipoib_create_debug_files(struct net_device *dev)
 221 {
 222         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 223         char name[IFNAMSIZ + sizeof("_path")];
 224
 225         snprintf(name, sizeof(name), "%s_mcg", dev->name);
 226         priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
 227                                                ipoib_root, dev, &ipoib_mcg_fops);
 228
 229         snprintf(name, sizeof(name), "%s_path", dev->name);
 230         priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
 231                                                 ipoib_root, dev, &ipoib_path_fops);
 232 }
 233
 234 void ipoib_delete_debug_files(struct net_device *dev)
 235 {
 236         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 237
 238         debugfs_remove(priv->mcg_dentry);
 239         debugfs_remove(priv->path_dentry);
 240         priv->mcg_dentry = priv->path_dentry = NULL;
 241 }
 242
 243 void ipoib_register_debugfs(void)
 244 {
 245         ipoib_root = debugfs_create_dir("ipoib", NULL);
 246 }
 247
 248 void ipoib_unregister_debugfs(void)
 249 {
 250         debugfs_remove(ipoib_root);
 251 }